Question

For a spontaneous process:

• A. enthalpy change of the system must be negative
• B. entropy change of the system must be positive
• C. entropy change of the surrounding must be positive
• D. entropy change of the system plus surrounding must be positive

Answer 1

The correct option is D entropy change of the system plus surrounding must be positive

For spontaneous process, enthalpy change is negative and entropy must be positive. A sponteneous reaction is a reaction that occurs in a given set of condition without intervention, so it is accompanied by an increase in overall entropy or disorder.